Coronary bifurcations are associated with increased risk of complications.Older bifurcation classifications are very confusing and hard to memorize Medina et al.made first attempt to simplify coronary bifurcations.They divided bifurcation lesions into 3 segments: proximal segment of main branch, side branch ostia, and distal segment of the main branch.Any involvement of each segment, will receive the suffix 1 otherwise suffix 0 was assigned starting from left to right.